<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>
    <script src="../js/prop-types.js"></script>
</head>

<body>
    <div id="root"></div>
    <script type="text/babel">
        class Child extends React.Component {
            constructor(props) {
                super(props);
            }
            render() {
                console.log('Child Component render()');
                return (
                    <h1>{this.props.name}</h1>
                )
            }
        }

        class Parent extends React.Component {
            constructor(props) {
                super(props);
                this.state = {
                    name: "world",
                };
                this.changeState = this.changeState.bind(this);
            }
            changeState() {
                this.setState({
                    name: "new world"
                });
            }
            render() {
                console.log('Parent Component render()');
                return (
                    <div>
                        <Child name={this.state.name} />
                        <button onClick={this.changeState}>change state</button>
                    </div>
                )
            }
        }

        ReactDOM.render(<Parent/>, document.getElementById('root'))
    </script>
</body>

</html>